Abstract
Neutron wave propagation is considered by multigroup diffusion theory in a heterogeneous multiplying system having periodic arrays of line fuel rods. The coupled equations are resolved into uncoupled equations by suitable linear transformation. By means of Green functions for a point or a line neutron source, the behavior of the neutron waves originating from a periodically varying neutron source are investigated in an infinite system. In such a system, the neutron fluxes are represented by means of a Floquet solution relevant to the buckling B which depends on the angular frequency φ of the external neutron source. Neutron waves propagate analogously to classic waves spreading in accordance with Hüygens' & Fresnel's principles.
Published Version
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